21233044142 has 4 divisors (see below), whose sum is σ = 31849566216. Its totient is φ = 10616522070.

The previous prime is 21233044139. The next prime is 21233044181. The reversal of 21233044142 is 24144033212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21233044142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308261034 + ... + 5308261037.

It is an arithmetic number, because the mean of its divisors is an integer number (7962391554).

Almost surely, 2^21233044142 is an apocalyptic number.

21233044142 is a deficient number, since it is larger than the sum of its proper divisors (10616522074).

21233044142 is a wasteful number, since it uses less digits than its factorization.

21233044142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616522073.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21233044142 its reverse (24144033212), we get a palindrome (45377077354).

The spelling of 21233044142 in words is "twenty-one billion, two hundred thirty-three million, forty-four thousand, one hundred forty-two".